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the same indicator goes high then the problem is in the instrument or EGT sensor and engine
is fine.
Example #3.
Let’s say CHT
& EGT are hot on both cylinders. This will usually indicate a lean situation.
As the problem is common to both cylinders, it would be usual that the problem is with a part
of the system that is common to both cylinders. Leak in the pulse line between crankcase and
fuel pump, clogged fuel filter, pinhole leak in fuel line, defective fuel pump, crankcase seal
leak, etc. It may simply be required that the carb jets be adjusted or changed for larger ones.
This may be evident by a noted change in climatic conditions, such as the outside air
temperature has gotten cooler, whereby, the engine will now require more fuel to properly
run. If this is the case, it may be noted that the engine makes slightly more power than before.
Carbs must be re-jetted. An engine that is slightly lean will make more power than normal.
However, with the extra power will come extra heat. An engine running in this lean condition
may be on the verge of burning up and is to be avoided under all circumstances.
Example #4.
A 2 cycle can also be to cold which is usually caused by to much fuel. This is known as a rich
condition which will result in rough running, bogging down in the mid range, performance
loss and increased fuel rate. There can be many causes.
Improper jetting
Jet needle set to rich.
Float stuck open.
Enrichener circuit (choke) partially activated.
Carburetor slide mechanism, assemble improperly.
Summary of Contents for F-23
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